Roller skate



FIG. 1 is a perspective view of a roller skate showing my new design;

FIG. 2 is a front elevational view thereof; the opposite side being a mirror image of the shown;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showing of the boot in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for roller skate, as shown and described. 